CN105318349B - Fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation - Google Patents

Fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation Download PDF

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CN105318349B
CN105318349B CN201410363154.7A CN201410363154A CN105318349B CN 105318349 B CN105318349 B CN 105318349B CN 201410363154 A CN201410363154 A CN 201410363154A CN 105318349 B CN105318349 B CN 105318349B
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primary air
frequency modulation
peak regulation
unit
air flow
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CN201410363154.7A
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CN105318349A (en
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姚远
揭其良
王礼
王洪凯
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国家电网公司
国网辽宁省电力有限公司电力科学研究院
辽宁东科电力有限公司
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Abstract

The present invention relates to a kind of fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, step are as follows:Increase the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation in the Logical Configuration primary air fan of former coordinated control system exports heat primary air main-piping pressure and separate unit coal pulverizer Primary air flow control loop;The fired power generating unit Primary air flow control loop Logical Configuration based on power grid frequency modulation peak regulation is carried out, and outputs it the feed-forward signal for being incorporated into and exporting heat primary air main-piping pressure and separate unit coal pulverizer Primary air flow control in the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation as primary air fan;Control system puts into actual motion, bent according to real time execution, fired power generating unit Primary air flow control loop relevant parameter of the on-line tuning based on power grid frequency modulation peak regulation, is finally reached expected control line effect.The present invention is by existing DCS coordinated control systems, and real-time is good, and field adjustable process is simple, is easy to Project Realization.

Description

Fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation

Technical field

The invention belongs to thermal power generation unit automatic control technology field, more particularly to it is a kind of based on power grid frequency modulation peak regulation Fired power generating unit Primary air flow control method.Controlled automatically available for primary air flow of the fired power generating unit when participating in power grid frequency modulation peak regulation System, ensure unit while frequency modulation peak regulation response quickly is stable, automatically by major parameter control in the reasonable scope.

Background technology

Frequency modulation peak regulation is that grid company maintains the stable important means of mains frequency.It is safe and stable, economical for power network Operation and raising power quality, grid company requires that online thermal power generation unit must possess frequency modulation peak regulating function, and carries Specific technical indicator and evaluation method are gone out.Fired power generating unit coordinated control system is the highest controller in unit allocation, It is responsible for coordinating steam turbine and the energy balance of boiler room controls, ensures that unit participates in the regulation quality of power grid frequency modulation peak regulation.Coordinate It is multi-input multi-output system to control controlled device, has the spy of non-linear, parameter slow time-varying and large time lag and big inertia Point.The controlling unit of powder processed and combustion system is especially embodied in, from feeder rotating speed increase coal-supplying amount is improved, is increased to boiler combustion The quantity of steam increase of strong production, the actual load increase of unit is realized, whole process link is more, and inertia is larger, is adjusted to frequency modulation Peak function design and realization brings many difficulties.

Numerous domestic scholars were carried out to the Primary air flow control relevant issues of fired power generating unit coordinated control system in recent years Research and discussion, such as《Generating equipment》's《600MW unit boiler primary air pressure operation logic optimizing research》For coal pulverizer Hot and cold air door action interferes with each other the problems such as serious, coal pulverizer operating condition is unstable, power consumption is uncontrollable, and First air is motor-driven Leaf is changed to a coal-supplying amount of peak load in tracking operation coal pulverizer by tracking boiler master instruction originally, is determined by coal-supplying amount Main pipe primary air pressure controlling value.《Blower fan technology》's《Station boiler air and flue system Study on energy saving》With theory analysis and practice The method being combined, in terms of reducing boiler wind and smoke system operational parameters and improving blower fan actual operating efficiency two, it is proposed that A series of technologies for reducing Air Fans of Utility Boilers energy consumption and measure.《Thermal power generation》's《600MW units mix burning brown coal scrap build Application practice》Drying capacity of pulverizer deficiency problem can be caused by mixing a large amount of lignite of burning for thermal power plant, by changing air preheat Device turns to, expands First air wind cabin angle and installed soft seal and extending capacity reformation, raising coal pulverizer have been carried out to coal pulverizer nozzle ring Entrance heat primary air temperature, drying capacity of pulverizer and grinding output significantly increase, and blower fan resistance reduces.Chinese patent " boiler Concentration of pulverized coal on-line measurement device " number of patent application CN201210027480.1, it is online to devise a kind of coal powder density Measurement apparatus, solve existing boiler concentration of pulverized coal and on-line measurement device lacks, cost is high, measurement accuracy is low etc. be present Problem.A kind of Chinese patent " coal powder boiler combustion feedforward and feedback composite optimization control method " number of patent application CN201110376115.7, it is proposed that a kind of coal powder boiler combustion feedforward and feedback composite optimization control method, for realize wind with The dynamic of the full combustion process of coal full working scope accurately matches, and makes boiler combustion efficiency and NOXDischarge capacity is in optimum state.It is Chinese special Profit " middle storage formula Ball Mill pulverized coal preparation system running optimizatin and energy-saving control method " number of patent application CN200810025331.5, propose Middle storage formula Ball Mill pulverized coal preparation system running optimizatin and energy-saving control method, by establishing pulverized coal preparation system unit power consumption of coal pulverizing and each operation Nonlinear neural network model between parameter, it is ensured that pulverized coal preparation system extreme duty effectively reduces system near optimum condition Powder unit consumption.

The above document and patent are mainly from reduction primary air fan power consumption, reduction NOXDischarge capacity and First air measure Amount accuracy etc. is set forth, and proposes the Primary air flow control design method for being advantageous to energy-saving and emission-reduction with answering Targetedly ground with example, but to Primary air flow control of the unit under different operating modes during frequency modulation peak regulation Study carefully.

The content of the invention

For above-mentioned problems of the prior art, the invention provides the fired power generating unit one based on power grid frequency modulation peak regulation Secondary air quantity control method, it is automatic its purpose is to solve primary air flow of the fired power generating unit during power grid frequency modulation peak regulation is participated in Control problem, equipment potential is given full play to, while power grid frequency modulation peak regulation requirement is met, ensure the stability of major parameter.

The purpose of the present invention is achieved through the following technical solutions:

Fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, comprises the following steps:

The first step:Heat primary air main-piping pressure and one mill are exported in the Logical Configuration primary air fan of former coordinated control system Increase the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation in coal machine Primary air flow control loop;

Second step:Carry out the fired power generating unit Primary air flow control loop Logical Configuration based on power grid frequency modulation peak regulation, and by its Output is incorporated into the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation as primary air fan outlet heat The feed-forward signal of First air main-piping pressure and separate unit coal pulverizer Primary air flow control;

3rd step:Control system puts into actual motion, and according to real time execution curve, on-line tuning is based on power grid frequency modulation peak regulation Fired power generating unit Primary air flow control loop relevant parameter, be finally reached expected control effect.

The described fired power generating unit Primary air flow control loop based on power grid frequency modulation peak regulation includes judging the operation shape of unit State, the running status different according to unit calculate the primary air fan outlet heat primary air main-piping pressure and separate unit coal pulverizer one of unit Secondary air quantity feed-forward signal.

The running status of described unit, including primary frequency modulation action, frequency modulation frequency modulation action, unit phase tune at a low ebb Peak, unit are in accumulation of energy accumulation of energy consistent, unit with the frequency modulation peak regulation direction of unit and the tune of unit of peak period peak regulation, unit Frequency modulation peak is in opposite direction, pulverizer capacity ability meets that the requirement of frequency modulation peak regulation, pulverizer capacity ability reach secure border not Meet the requirement of frequency modulation peak regulation.

The primary air fan outlet heat primary air main-piping pressure and separate unit pulverizer' s primary air flow feed-forward signal of described unit, It is by multiple corrections based on operating states of the units, and multiple correction factor compositions based on operating states of the units, including one Secondary frequency modulation correction, frequency modulation frequency modulation correction, the accumulation of energy abundance correction of unit, storage of the generator set deficiency correction, unit are in Low ebb phase peak regulation correction factor, unit are in peak period peak regulation correction factor, pulverizer capacity ability meets wanting for frequency modulation peak regulation Correction factor, pulverizer capacity ability is asked to be unsatisfactory for the requirement correction factor of frequency modulation peak regulation.

The setting method of the described fired power generating unit Primary air flow control loop relevant parameter based on power grid frequency modulation peak regulation is, System is put into actual motion, operation curve and Primary air flow control curve are controlled according to unit frequency modulation peak regulation, it is repeatedly online whole Determine relevant parameter, ensure that unit while frequency modulation peak regulation response quickly is stable, automatically controls major parameter in zone of reasonableness It is interior.

The beneficial effects of the invention are as follows:

(1)It is accurate to control primary air fan during unit difference running status to export by the judgement to operating states of the units Heat primary air main-piping pressure and separate unit pulverizer' s primary air flow, ensure that Primary air flow control of the unit when participating in frequency modulation peak regulation is steady Qualitative and accuracy, equipment potential is given full play to so as to realize, while power grid frequency modulation peak regulation requirement is met, ensure main ginseng Several stability.

(2)The labor intensity of operations staff, and technical merit of the control effect independent of operations staff can effectively be reduced.

(3)Real-time is good, and field adjustable process is simple, is easy to Project Realization.

Brief description of the drawings:

The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.

Fig. 1 is inventive algorithm logic chart;

Fig. 2 is the workflow block diagram of the present invention.

Embodiment

The present invention is a kind of fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, as shown in Fig. 2 this hair Bright workflow comprises the following steps:

The first step:Heat primary air main-piping pressure and one mill are exported in the Logical Configuration primary air fan of former coordinated control system Increase the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation in coal machine Primary air flow control loop;

Second step:Carry out the fired power generating unit Primary air flow control loop Logical Configuration based on power grid frequency modulation peak regulation, and by its Output is incorporated into the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation as primary air fan outlet heat The feed-forward signal of First air main-piping pressure and separate unit coal pulverizer Primary air flow control;

3rd step:Control system puts into actual motion, and according to real time execution curve, on-line tuning is based on power grid frequency modulation peak regulation Fired power generating unit Primary air flow control loop relevant parameter, be finally reached expected control effect.

The described fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, it is characterised in that:Described base Include judging the running status of unit in the fired power generating unit Primary air flow control loop of power grid frequency modulation peak regulation, it is different according to unit Running status calculates the primary air fan outlet heat primary air main-piping pressure and separate unit pulverizer' s primary air flow feed-forward signal of unit.

The described fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, it is characterised in that:Described machine The running status of group, including primary frequency modulation action, frequency modulation frequency modulation action, unit phase peak regulation at a low ebb, unit are in peak period The frequency modulation peak regulation of the accumulation of energy of peak regulation, unit accumulation of energy consistent, unit with the frequency modulation peak regulation direction of unit and unit is in opposite direction, mill Coal machine capacity meets that the requirement of frequency modulation peak regulation, pulverizer capacity ability reach secure border and be unsatisfactory for wanting for frequency modulation peak regulation Ask.

The described fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, it is characterised in that:Described machine The primary air fan outlet heat primary air main-piping pressure and separate unit pulverizer' s primary air flow feed-forward signal of group, are to be based on unit by multiple The correction of running status, and multiple correction factor compositions based on operating states of the units, including it is primary frequency modulation correction, secondary Frequency modulation correction, the accumulation of energy abundance correction of unit, storage of the generator set deficiency correction, unit phase peak regulation amendment system at a low ebb Number, unit are in peak period peak regulation correction factor, pulverizer capacity ability meets requirement correction factor, the coal pulverizer of frequency modulation peak regulation Capacity is unsatisfactory for the requirement correction factor of frequency modulation peak regulation.

The described fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, it is characterised in that:Described base It is that system is put into actual fortune in the setting method of the fired power generating unit Primary air flow control loop relevant parameter of power grid frequency modulation peak regulation OK, operation curve and Primary air flow control curve are controlled according to unit frequency modulation peak regulation, repeatedly on-line tuning relevant parameter, ensures machine Group is while frequency modulation peak regulation response quickly is stable, automatically by major parameter control in the reasonable scope.

The core concept of the present invention is that fired power generating unit running status during frequency modulation peak regulation is complicated and changeable, only by right The judgement of operating states of the units, accurate primary air fan outlet heat primary air main-piping pressure when controlling unit difference running status and Separate unit pulverizer' s primary air flow, it just can guarantee that the steady of load responding rapidity and major parameter of the unit when participating in frequency modulation peak regulation It is qualitative.

Inventive algorithm logic chart, i.e., the fired power generating unit Primary air flow control algorithm logic based on power grid frequency modulation peak regulation is as schemed Shown in 1.In Fig. 1, primary frequency modulation target, frequency modulation frequency modulation increment target, load instruction, actual load, heat primary air main-piping pressure, Directly it can be read from DCS real-time data bases.Switching condition load up accumulation of energy deficiency, load down accumulation of energy deficiency, load up, drop Load, drawn by logic judgment, the main steam pressure of unit, the variation tendency of main steam temperature and the change of unit load instruction Accumulation of energy abundance is then thought when trend is consistent, the main steam pressure of unit, the variation tendency of main steam temperature and unit load instruct Variation tendency it is inconsistent when then think accumulation of energy deficiency, the load instruction before rate limit is more than the load instruction after rate limit When think load up, the load instruction before rate limit thinks load down when being less than the load instruction after rate limit.f1(x) it is Non-linear function generator, its input is primary frequency modulation target, and the primary air fan that export influences for primary frequency modulation exports heat once Wind main-piping pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount.f2(x) it is non-linear function generator, it is two that it, which is inputted, Secondary frequency modulation increment target, the primary air fan that export influences for frequency modulation frequency modulation export heat primary air main-piping pressure feedforward amount or one mill Coal machine primary air flow feedforward amount.f3(x) it is non-linear function generator, its input is load instruction, exports and is filled for storage of the generator set Primary air fan outlet heat primary air main-piping pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount when sufficient.f4(x) to be non-thread Property function generator, its input is load instruction, export for unit load up when accumulation of energy deficiency when primary air fan outlet heat once Wind main-piping pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount.f5(x) it is non-linear function generator, its input is negative Lotus instructs, export for unit load down when accumulation of energy deficiency when primary air fan export heat primary air main-piping pressure feedforward amount or one mill Coal machine primary air flow feedforward amount.f6(x) be non-linear function generator, its input is actual load, export for load up when Correction factor, scope 0 ~ 1, primary air fan outlet heat primary air main-piping pressure feedforward is corrected when being in peak period peak regulation for unit Amount or separate unit pulverizer' s primary air flow feedforward amount.f7(x) it is non-linear function generator, its input is actual load, exports and is Correction factor during load down, scope 0 ~ 1, for unit phase peak regulation amendment primary air fan outlet heat primary air main pipe at a low ebb Pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount.f8(x) it is non-linear function generator, its input is heat primary air Main-piping pressure, export the correction factor contributed for primary air fan, scope 0 ~ 1, for the capacity amendment according to primary air fan Primary air fan exports heat primary air main-piping pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount.f1(x)、f2(x)、f3 (x)、f4(x)、f5(x) function is to form the fired power generating unit primary air fan outlet heat primary air main pipe based on power grid frequency modulation peak regulation Pressure feedforward amount or separate unit pulverizer' s primary air flow feedforward amount a reference value, f6(x)、f7(x)、f8(x) then according to the side of unit operation Boundary's condition is modified to a reference value.f1(x)、f2(x)、f3(x)、f4(x)、f5(x)、f6(x)、f7(x)、f8(x) parameter can root According to real-time curve on-line tuning, the principle adjusted is by existing DCS coordinated control systems, ensures that unit responds in frequency modulation peak regulation While fast and stable, automatically by major parameter control in the reasonable scope.

Below by taking certain 600MW supercritical thermal power unit as an example, introduce algorithm parameter and adjust result, as shown in table 1.

Unit overview:The overcritical Thermal generation unit boilers of the 600MW manufacture for Harbin Boiler Co., Ltd., Steam turbine manufactures for Harbin Turbine Factory Co., Ltd., and generator manufactures for Harbin Electric Machine Co., Ltd.. The unit boiler is supercritical parameter Once-through Boiler, a resuperheat, single burner hearth balanced draft, ∏ types arrangement, opposed firing Swirl flow combustion mode, all steel framework overhung construction, closed seal, dry ash extraction pulverized-coal fired boiler.Pulverized coal preparation system uses malleation blow-through Formula, equipped with 6 coal pulverizers;Primary air fan provided with two 50% capacity provides once heat, cold wind pulverized coal conveying.Control system is adopted It is american fox POLO company technique, coordinated control system uses the coordinated control system based on boiler follow, Fuel- Water Rate control is using water with coal mode.

In table 1 with f1(x) x corresponding to is primary frequency modulation target(MW);With f2(x) x corresponding to is frequency modulation frequency modulation increment target (MW);With f3(x) x corresponding to is load instruction(MW);With f4(x) x corresponding to is load instruction(MW);With f5(x) x corresponding to For load instruction(MW);With f6(x) x corresponding to is actual load(MW);With f7(x) x corresponding to is actual load(MW);With f8 (x) x corresponding to is heat primary air main-piping pressure(kPa);The primary frequency modulation target of the unit, frequency modulation frequency modulation increment target, load Instruction, actual load, heat primary air main-piping pressure directly can be read from DCS real-time data bases;Completion is based on power grid frequency modulation The Primary air flow control loop Logical Configuration of peak regulation, and output it and be incorporated into the Primary air flow control based on power grid frequency modulation peak regulation After exporting heat primary air main-piping pressure and separate unit pulverizer' s primary air flow feedforward amount as primary air fan in circuit interface, by system Actual motion is put into, operation curve and Primary air flow control curve are controlled according to unit frequency modulation peak regulation, repeatedly on-line tuning f1 (x)、f2(x)、f3(x)、f4(x)、f5(x)、f6(x)、f7(x)、f8(x) relevant parameter, ensure that unit is fast in the response of frequency modulation peak regulation While speed is stable, automatically by major parameter control in the reasonable scope, the labor intensity of operations staff is effectively reduced;Scene Debugging process is simple, is easy to Project Realization.

Fired power generating unit Primary air flow control parameter tuning of the table 1 based on power grid frequency modulation peak regulation

Heat primary air main-piping pressure controls x(MW) -36 -2 0 2 36 f1(x)(kPa) -0.1 0 0 0 0.1 Heat primary air main-piping pressure controlsx(MW) -12 -2 0 2 12 f2(x)(kPa) -0.2 0 0 0 0.2 Heat primary air main-piping pressure controlsx(MW) 0 300 400 500 600 f3(x)(kPa) 0 0 0 0 0 Heat primary air main-piping pressure controlsx(MW) 0 300 400 500 600 f4(x)(kPa) 0.2 0.2 0.2 0.1 0 Heat primary air main-piping pressure controlsx(MW) 0 300 400 500 600 f5(x)(kPa) 0 -0.1 -0.1 -0.2 -0.2 Heat primary air main-piping pressure controlsx(MW) 0 300 400 500 600 f6(x) 1 1 1 1 0 Heat primary air main-piping pressure controlsx(MW) 0 300 400 500 600 f7(x) 0 0 1 1 1 Heat primary air main-piping pressure controls x(kPa) 0 7 10 11 12 f8(x) 1 1 1 1 0 Grind Primary air flow control x(MW) -36 -2 0 2 36 f1(x)(t/h) -2 0 0 0 2 Grind Primary air flow controlx(MW) -12 -2 0 2 12 f2(x)(t/h) -5 0 0 0 5 Grind Primary air flow controlx(MW) 0 300 400 500 600 f3(x)(t/h) 0 0 0 0 0 Grind Primary air flow controlx(MW) 0 300 400 500 600 f4(x)(t/h) 5 5 4 3 2 Grind Primary air flow controlx(MW) 0 300 400 500 600 f5(x)(t/h) 0 -1 -3 -4 -5 Grind Primary air flow controlx(MW) 0 300 400 500 600 f6(x) 1 1 1 1 0 Grind Primary air flow controlx(MW) 0 300 400 500 600 f7(x) 0 0 1 1 1 Grind Primary air flow control x(t/h) 0 40 50 60 70 f8(x) 1 1 1 1 0

Claims (1)

1. the fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation, it is characterised in that comprise the following steps:
The first step:Heat primary air main-piping pressure and separate unit coal pulverizer are exported in the Logical Configuration primary air fan of former coordinated control system Increase the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation in Primary air flow control loop;
Second step:The fired power generating unit Primary air flow control loop Logical Configuration based on power grid frequency modulation peak regulation is carried out, and is output it It is incorporated into the fired power generating unit Primary air flow control circuit interface based on power grid frequency modulation peak regulation as primary air fan outlet heat once The feed-forward signal of wind main-piping pressure and separate unit coal pulverizer Primary air flow control;
3rd step:Control system puts into actual motion, according to real time execution curve, fire of the on-line tuning based on power grid frequency modulation peak regulation Group of motors Primary air flow control loop relevant parameter, is finally reached expected control effect;
The described fired power generating unit Primary air flow control loop based on power grid frequency modulation peak regulation includes judging the running status of unit, according to The primary air fan outlet heat primary air main-piping pressure and separate unit coal pulverizer First air of unit are calculated according to the different running status of unit Measure feed-forward signal;
The running status of described unit, including primary frequency modulation action, frequency modulation frequency modulation action, unit phase peak regulation at a low ebb, machine The frequency modulation of accumulation of energy with the frequency modulation peak regulation direction of unit consistent, unit accumulation of energy and unit of the group in peak period peak regulation, unit is adjusted Peak is in opposite direction, pulverizer capacity ability meets that the requirement of frequency modulation peak regulation, pulverizer capacity ability reach secure border and be unsatisfactory for The requirement of frequency modulation peak regulation;
The primary air fan outlet heat primary air main-piping pressure and separate unit pulverizer' s primary air flow feed-forward signal of described unit, be by Multiple corrections based on operating states of the units, and multiple correction factor compositions based on operating states of the units, including once adjust Frequency correction, frequency modulation frequency modulation correction, the accumulation of energy abundance correction of unit, storage of the generator set deficiency correction, unit are at a low ebb Phase peak regulation correction factor, unit are in peak period peak regulation correction factor, pulverizer capacity ability meets that the requirement of frequency modulation peak regulation is repaiied Positive coefficient, pulverizer capacity ability are unsatisfactory for the requirement correction factor of frequency modulation peak regulation;
The setting method of the described fired power generating unit Primary air flow control loop relevant parameter based on power grid frequency modulation peak regulation is to be System input actual motion, controls operation curve and Primary air flow control curve, repeatedly on-line tuning phase according to unit frequency modulation peak regulation Related parameter, ensure unit while frequency modulation peak regulation response quickly is stable, automatically by major parameter control in the reasonable scope.
CN201410363154.7A 2014-07-29 2014-07-29 Fired power generating unit Primary air flow control method based on power grid frequency modulation peak regulation CN105318349B (en)

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CN106594793B (en) * 2016-11-22 2018-10-19 国网辽宁省电力有限公司电力科学研究院 Fired power generating unit medium-speed pulverizer outlet temperature controls optimization method
CN108448654A (en) * 2018-04-09 2018-08-24 华北理工大学 A kind of fired power generating unit peak-regulating low-load runs the method for adjustment of the second high efficient district
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CN102425807B (en) * 2011-11-23 2014-04-16 华北电力大学(保定) Combustion feedforward and feedback composite optimization controlling method for pulverized coal fired boiler
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